Hydraulic Cold Drawn Seamless Steel Tubing For Hydraulic Fuel Line

Specifications:

• Size:OD:4mm-60mm,WT:0.5mm-7mm
• Standard:DIN2391/C,EN10305-4,SAEJ524
• Material: ST35,ST37,ST37.4,ST44.4,ST52.4,E235,E355,SAE1010
• Delivery State:NBK+Black phosphate.
• Length:5.8m,6m.
• Package:Bundles or wooden cases.
• Surface Anti-rust:Both outside and internal tube surface flushing with anti-rust oil.
• Surface quality:very smooth and bright without oxide scale,pock,strach,crack and other defects.
• Surface Cleaness:clean without iron scrap,dust,better for hydraulic system life.
• Properties:better extending rate and strength property,after bending with no deformation,after flattening and flaring process with no crack.
• Raw material:Bao Steel,Huai Steel,XingCheng Steel with good quality.

Quick Detail:

1.Precision seamless tubes for automotive industry are made using the cold drawing process. Precision tubes are made from carbon steel from quality Bao Steel,XingCheng Steel,and HuaiSteel.

2. The tubes are high precision in tolerance,excellent surface brightness,no oxidization on the outer and inner walls after heat treatment,high cleanness of inside wall.

3. No deformation after cold bending,no crack after flaring and flattening.

4.Stable work pressure for hydraulic system.

Description:

Synopsis of Process Routing: Cold drawn and bright NBK seamless steel tube is used as the tube to be phosphated. The phosphated is realized with the imported chemical fluid to form a black film. The antirust oil is absorbed by means of the micro pore on the film to prevent from the rust. The caps are covered at two ends of tube to prevent from the dust.

Main Features: color of steel tube: bright black. Color is homogeneously distributed on the tube surface. The tube has good property of antirust.

No crack will occur after flaring and flattening for the industry, which the bending and forming is required in process.

Without oxidization, crack, fold, rolling fold, scar and laminar defect on the surface. The depth of defects (e.g. scratch mark, bulge and concavity) is not allowed to exceed 0.025mm (such requirement is stricter than DIN2391 standard).